prometheus version: prometheus-2.6.0-rc.0.linux-amd64.tar.gz
consul version: consul_1.4.0_linux_amd64.zip
os : contos 7

#cat prometheus.yml

  - job_name: 'consul-prometheus' 
    consul_sd_configs:
      - server: '10.252.252.107:8500'
        services: []

error logs:
level=warn ts=2019-01-09T03:21:21.305552906Z caller=scrape.go:835 component="scrape manager" scrape_pool=consul-prometheus target=http://10.252.252.102:9999/metrics msg="append failed" err=""INVALID" is not a valid start token"

picture:

How can I solve this problem!!!